Continuous Gas Analyzers, in-situ laser (LDS6, SITRANS SL)

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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
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Introduction
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Introduction to TDLS:
LDS 6 and SITRANS SL
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LDS 6
General information
19" central unit
Cross-duct sensor CD 6
Documentation
Suggestions for spare parts
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SITRANS SL
In-situ O2 and CO gas analyzer
Documentation
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
Introduction
Introduction to TDLS: LDS 6 and SITRANS SL
■ Overview
In-situ process gas analysis
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Process gas analyzers are used for continuous determination of
the concentrations of one or more gases in a gas mixture. Determination of the concentration of gases in a process is used to
control and monitor process flows, and is therefore decisive for
the automation and optimization of processes and ensuring
product quality. In addition, process gas analyzers are used to
check emissions, thus making an important contribution to
environmental protection, as well as for ensuring compliance
with statutory directives.
In-situ analytical procedures feature physical measurements in
the flow of process gas directly in the actual process gas line. In
contrast to extractive gas analysis, a sample is not taken and
routed on to the analyzer via a sample line and sample preparation. Only in exceptional cases, the process conditions make
it necessary to condition the sample gas stream in a bypass line
with respect to process temperature, pressure and/or optical
path length. Further conditioning of the process gas, such as
drying or dust precipitation, is unnecessary. The analyzer
carrying out in-situ measurements must always take into account
changing process conditions (if these occur) and be able to
automatically process them in the calibration model. Computed
temperature and pressure compensation is frequently required
for this. In addition, the analyzer must be extremely rugged since
its sensors have direct contact with the process gas. The fast
and non-contact measurement of gas concentrations directly in
the process is the domain of in-situ diode laser gas analyzers.
The gas analyzer LDS 6 combines the compact and servicefriendly design, simple operation and network capability of the
Series 6 analyzers with the well-known exceptional performance
data of in-situ gas analysis - namely high ruggedness and availability as well as low maintenance - by using diode laser
technology and fiber-optics. Up to three CD 6 in-situ cross-duct
sensors (which are also optionally available in an intrinsicallysafe version for operation in hazardous areas) can be combined
with an LDS 6 analyzer in the compact 19" rack unit enclosure.
The distance between the analyzer’s control unit - typically in an
existing instrument room or the process plant’s control room and the max. three measuring points can be up to 700 m in each
case.
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The SITRANS SL gas analyzer for highly sensitive measurement
of oxygen and carbon monoxide has a more integrated design
without fiber-optic cables and with only one pair of cross-ducts
sensors - a transmitter unit and a detector unit. In this case the
receiver has a local user interface (LUI) which is controlled using
IR remote control.
A maintenance-free reference gas cell integrated in both
analyzers drastically reduces the need for recalibration
(SITRANS SL) or even makes its superfluous (LDS 6). Remote
scanning and diagnostics of the analyzers is possible using the
Ethernet interface present as standard.
The list of gas components measurable using NIR diode laser
technology already comprises:
• For the LDS 6 analyzer:
O2, NH3, HCl, HF, H2O, CO, CO2, ...
• For the SITRANS SL analyzer: O2, CO
The list is being permanently extended as laser technology is
developed further. The LDS 6 O2 analyzers additionally allow
simultaneous non-contact determination of high process gas
temperatures.
Gas measurements with diode lasers feature exceptional selectivity and flexibility. Neither high process temperatures nor high
and varying concentrations of particles in the gas have an
influence on the quality of the result within wide ranges. For
example, it is possible with the LDS 6 to determine trace
concentrations of NH3, HCl or HF directly in moist process gases
even before any gas purification stage.
These features together with fast measurements free of dead
times mean that diode laser gas analysis with the LDS 6 or the
SITRANS SL is an extremely interesting alternative to established extractive analyses.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
■ Overview
LDS 6 is a diode laser gas analyzer with a measuring principle
based on the specific light absorption of different gas components. LDS 6 is suitable for fast and non-contact measurement
of gas concentrations in process or flue gases. One or two signals from up to three measuring points are processed simultaneously by the central analyzer unit. The in-situ cross-duct sensors
at each measuring point can be separated up to 700 m from the
central unit by using fiber-optic cables. The sensors are designed for operation under harsh environmental conditions and
contain a minimum of electrical components.
■ Application
Applications
• Process optimization
• Continuous emission monitoring for all kinds of fuels
(oil, gas, coal, and others)
• Process measurements in power utilities and any kind of
incinerator
• Process control
• Explosion protection
• Measurements in corrosive and toxic gases
• Quality control
• Environmental protection
• Plant and operator safety
Sectors
• Power plants
• Steel works
• Cement industry
• Chemical and petrochemical plants
• Automotive industry
• Waste incinerators
• Glass and ceramics production
• Research and development
• Semiconductor production
LDS 6, typical installation with cross-duct sensors
■ Benefits
The in-situ gas analyzer LDS 6 is characterized by a high availability and unique analytical selectivity, and is optimally suitable
for numerous applications. LDS 6 enables the measurement of
one or two gas components or - if desired - the gas temperature
directly in the process:
• With high dust load
• In hot, humid, corrosive, explosive, or toxic gases
• In applications showing strong varying gas compositions
• Under harsh environmental conditions at the measuring point
• Highly selective, i.e. mostly without cross-sensitivities
Special applications
In addition to the standard applications, special applications are
available upon request. These contain both an expansion of the
temperature and pressure range, as well as an expansion of the
concentration measuring range. Furthermore, other gas species
can be measured using special applications.
LDS 6 properties:
• Little installation effort
• Minimum maintenance requirements
• Extremely rugged design
• High long-term stability through built-in, maintenance-free
reference gas cell, field calibration is unnecessary
• Real-time measurements
Moreover, the instrument provides warning and failure
messages upon:
• Need for maintenance
- Erroneous reference function
- Bad signal quality
• Violation of a lower or upper alarm level for the measured
variable
• Transmitted amount of light violating an upper or lower limit
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
■ Design
The gas analyzer LDS 6 consists of a central unit and up to three
in-situ sensors. The connection between the central unit and the
sensors is established by a so-called hybrid cable, which contains optical fibers and copper wires. An additional cable connects the transmitter and receiver parts of the cross-duct sensor.
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Central unit
The central unit is housed in a 19" rack unit housing with 4 fixing
points for mounting:
• In a hinged frame
• In racks with or without telescopic rails
Display and control panel
• Large LCD field for simultaneous display of measurement
result and device status
• Contrast of the LCD field is adjustable via the menu
• LED background illumination of the display with
energy-saving function
• Easy-to-clean membrane touch pad with softkeys
• Menu-driven operation for parameterization and diagnostics
• Operation support in plain text
LED-backlit graphic
display and membrane
tactile-touch keyboard
Inputs and outputs
• One to three measurement channels with hybrid connections
for the sensors at the measuring points
• 2 analog inputs per channel for process gas temperature and
pressure
• 2 analog outputs per channel for gas concentration(s). For selected versions, the transmission can be read out as an alternative.
• 6 freely configurable binary inputs per channel for signaling
faults or maintenance requests from external temperature or
pressure transducers or sensor purging failure.
• 6 freely configurable binary outputs per channel (signaling of
fault, maintenance requirements, function control, transmission limit alarm, concentration limit alarm, store analog output)
Communication
Network connection: Ethernet (T-Base-10) for remote diagnostics and maintenance.
Status line to indicate
the device status
Two code levels
according to NAMUR
Menu-driven
operator control
with five softkeys
Physical unit of the
sample gas component
Numeric display
of concentrations
ESC key
to cancel entries
Numeric keypad
for entering digits
INFO key
for help in plain text
CLEAR key
to delete the
digits entered
LDS 6 central unit, membrane keyboard and graphic display
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ENTER key
to adopt
the numbers
MEAS key
to return direct to
measurement mode
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
Cross-duct sensors
Parts in contact with the process gas
The sensors normally do not come into contact with the process
gas, since purging with a gaseous media is applied at the process side. Stainless steel purging gas tubes in front of the sensor
windows immerse slightly into the process gas and thus limit the
purging volume. Special materials such as Hastelloy and plastics (PP) are available on request.
Hybrid and sensor cables
A combination of fiber-optic cables and twisted copper wires
connects the sensors to the central unit. The hybrid cable connects the central unit with the detector unit of the sensor, the sensor cable connects the transmitter and receiver units of the sensor.
Sensor CD 6, transmitter or detector unit
• In-situ cross-duct sensors, configured as transmitter and
detector unit, connected via sensor cable
• Connection to the LDS 6 central unit via a so-called hybrid
cable of max. 700 meters in length (total hybrid and sensor
connecting cable length: max. 250 m in Ex Zone 0 and Ex
Zone 1)
• Stainless steel, some painted aluminum
• IP65 degree of protection for sensor
• Adjustable flanges with flange connection
• DN 65/PN 6, ANSI 4"/150 lbs
• Optional flameproof window flanges with dimensions:
DN 65/PN 6, DN 80/PN 16, ANSI 4"/150 lbs, other process
interfaces available on request
• Purging facilities on the process and the sensor sides,
configurable application with purging gas connections for:
- Instrument air
- Purging air blower
- Steam
- Nitrogen
- Process gases to which the pressure equipment directive
cat. 2 does not apply
• In combination with high-pressure window flanges, process
purging can be done using instrument air or nitrogen
• Quick release fasteners for cleaning the measurement openings and the sensor window
• Optional: Version with explosion protection in accordance with
ATEX / IEC Ex ia
• Sensor type CD 6 is compliant with the pressure equipment
directive
For installation in Ex-protected environments, the legislative regulations have to be complied with, such as the spatial separation
of intrinsically-safe from non-intrinsically-safe cables.
In compliance with standard EN IEC 60079-14, systems with intrinsically-safe circuits must be installed such that their intrinsic
safety is not impaired by electric or magnetic fields. Therefore
the hybrid and sensor cables of the LDS 6 in an Ex application
must be routed in such a way that they cannot generate electric
or magnetic fields, e.g. by coiling them in more than one cable
loop. To guarantee a good signal quality and to avoid impermissible inductance loops, the hybrid and sensor cables should be
kept as short as possible.
• The distance between central unit and measuring point can
be
- up to 250 m for Ex units when used in Zone 0 and Zone 1
(total hybrid and sensor connecting cable length)
- up to 700 m for Ex units used in Zone 2 and for non-Ex units
• Hybrid and sensor cables
- Multimode fiber-optic cable, provided with SMA connections
for transmission of the measured signal
- Two-wire copper cable, in twisted pair version, for +24 V
supply of the detector electronics (+12 V in the case of Exsuitable instruments)
• Additionally for the hybrid cable:
- Single-mode fiber-optic cable, configured double-sided with
E2000 connectors for transmission of laser light
• Rugged cable sheath for laying in open cable ducts or ductworks
• Sheath material: oil-resistant polyurethane
Connections of the hybrid cable
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
■ Function
Operating principle
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LDS 6 is a gas analyzer employing single-line molecular absorption spectroscopy. A diode laser emits a beam of near-infrared
light, which passes through the process gas and is detected by
a receiver unit. The wavelength of the laser diode output is tuned
to a gas-specific absorption line. The laser continuously scans
this single absorption line with a very high spectral resolution.
Central unit
The result is a fully resolved single molecular line which is analyzed in terms of absorption strength and line shape. The influence of cross-sensitivities on the measurement is negligible,
since the quasi-monochromatic laser light is absorbed very selectively by only one specific molecular line in the scanned
spectral range.
Hybrid cables
Measurement path
Laser light
P1
Electrical signals
Measured
volume
Reflected LED light
Channel 1
CPU and
display
Laser
control
Signal
processing
Diode
laser
E/O
P2
E/O
P0
E/O
Measured
volume
Optocoupler
Channel 2
E/O
E/O
PR
Reference
cell
P3
Measured
volume
Channel 3
E/O
Basic design of the LDS 6
Configuration examples
A feature of the in-situ analytical procedure is that the physical
measurement takes place directly in the stream of process gas,
and usually also directly in the actual process gas line. All process parameters such as gas matrix, pressure, temperature,
moisture, dust load, flow velocity and mounting orientation can
influence the measuring properties of the LDS 6 and must therefore be systematically investigated for each new application.
A feature of the standard applications defined in the ordering
data of the LDS 6 is that the typical process conditions are wellknown, documented, and the guaranteed measuring properties
can be proven by reference installations. If you cannot find your
application among the standard applications, please contact
Siemens. We will be pleased to check your possible individual
application of the LDS 6. You can find an application questionnaire on the LDS 6 product sites on the Internet:
www.siemens.com/insituquestionnaire
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Central unit
Process flange
Transmitter unit
Hybrid cable
Gas concentration
Flue gas
composition
Steam
Dust load
Gas velocity
Gas temperature
Gas pressure
Receiver
Measurement
path length
Sensor connecting cable
Supplementary channel (option)
Supplementary channel (option)
Typical transmitted light setup of LDS 6, in-situ
To avoid contamination of sensor optics on the process side,
clean gaseous purging media such as instrument air, N2 or
steam are used. Purging air tubes on the sensor heads, which
slightly penetrate into the process gas stream, define the effective measuring path length.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
The LDS 6 can measure in both the transverse and longitudinal
directions of the process gas flow. In certain cases, the process
conditions make it necessary to condition the sample gas
stream in a bypass line with respect to process temperature,
pressure and/or optical path length. Further treatment of the process gas, such as drying or dust precipitation, is usually unnecessary.
In some specific cases, two components can be measured simultaneously if their absorption lines are so close to each other
that they can be detected within the laser spectrum by one single scan (for example water (H2O) and ammonia (NH3)).
Hybrid cable
Supplementary
channel (option)
Supplementary
channel (option)
Sensor connecting cable
Transmitter unit
Central unit
Sample
gas
inlet
Temperature
sensor
Sample gas
outlet
Receiver
Transmitter unit
Heating
(option)
Sample gas inlet
Sensor connecting cable
Supplementary
channel (option)
Supplementary
channel (option)
1+SSP
A flow cell is available by special application for the LDS 6 which
has been specially optimized for use with the LDS 6 and its
transmitted-light sensors with respect to handling and measuring performance. It is designed to reduce surface effects, and is
therefore also highly suitable for polar gases like ammonia. This
flow cell is available in heated and non-heated versions. Wheel
mounted and wall mounted versions are available.
Hybrid cable
2
+2
Typical transmitted light setup of LDS 6, in bypass
Central unit
Pump
Receiver
Absorption spectra of water and ammonia
Typical measurable gases for LDS 6 are:
• Oxygen (O2) for low and high pressure
• Hydrogen fluoride (HF) + water
• Hydrogen chloride (HCl) + water
• Ammonia (NH3) + water
• Water vapor (H2O)
• Carbon monoxide (CO)
• Carbon dioxide (CO2)
• CO + CO2
By using an internal reference cell normally filled with the gas
measured, the stability of the spectrometer is permanently
checked in a reference channel.
By doing so, the continuous validity of the calibration is ensured
without the need to carry out external recalibration using bottled
calibration gases or reference gas cells.
$EVRUSWLRQOLQH
Measuring configuration of LDS 6 with heated flow cell
General information
LDS 6 is connected to the measuring points by fiber optics. The
laser light is guided by a single-mode fiber from the central unit
to the transmitter unit of the in-situ sensor. The sensor consists of
a transmitter and a receiver; the distance between them defines
the measurement path. In the receiver box, the light is focused
onto a suitable detector. The detector signal is then converted
into an optical signal and transmitted via a second optical fiber
to the central unit, where the concentration of the gas component is determined from the detected absorption signal.
LDS 6 usually measures a single gas component by means of
the absorption capacity of a single fully resolved molecular absorption line. The absorption results from conversion of the radiation energy of the laser light into the internal energy of the molecule.
/DVHUOLQH
Typical spectral bandwidth of an absorption line compared to the bandwidth of the laser light.
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
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Influences on the measurement
Maintenance and fault messages
Dust load
LDS 6 outputs different warnings via relays:
• Need for maintenance (measured value is not influenced)
• Operating error (measured value might be influenced)
As long as the laser beam is able to generate a suitable detector
signal, the dust load of the process gases does not influence the
analytical result. By applying a dynamic background correction,
measurements can be carried out without any negative impact.
Under good conditions, particle densities up to 100 g/Nm3 (distance 1 m) can be handled by the LDS 6. Varying dust loads are
compensated by scanning the laser over the gas absorption line
and the current background.
The effect of a high dust load is complex and depends on the
path length and particle size. The optical damping increases at
longer path lengths. Smaller particles also have a large influence
on the optical damping. With a combination of high dust load,
long path length and small particle size, the technical support at
Siemens should be consulted.
Temperature
The effect of temperature on the absorption strength of the
molecule line is compensated by a correction factor. A temperature signal can be fed into an analog instrument from an external
temperature sensor. This signal is then used to correct the influence of the temperature on the observed line strength. If the temperature of the sample gas remains constant, it is alternatively
possible to carry out a static correction using a preset value.
At high process gas temperatures, generally from approximately
1 000 °C, there may be noticeable broadband IR radiation of gas
and dust, or flames may occasionally occur in the measurement
path. An additional optical bandpass filter can be set upstream
of the detector to protect it and prevent saturation by the strong
background radiation.
Pressure
The effect of pressure on the absorption line, and consequently
on the measured concentration, is compensated with a correction factor. The gas pressure can affect the line shape of the molecular absorption line. An analog pressure signal can be sent to
the device from an external pressure sensor to fully compensate
for the effect of the pressure including the density effect.
Optical path length
The absorption values analyzed by the LDS 6 are typically small.
As a result of Beer-Lambert’s law, the absorption of laser light depends on the optical path length within the gas, among other
factors. Therefore, the precision in determining the effective optical path length in the process might limit the overall precision
of the measurement.
As the sensor optics on the process side normally need to be
purged to keep them clean over a long period of time, the thickness of the mixing zone between the purging medium and the
process gas and its concentration distribution need to be considered. In a typical in-situ installation directly in the line and with
some meters of path, the influence of the purging gas on the effective path length can be neglected.
Path length and dust load are mutually influencing: the higher
the dust load in the process, the shorter the max. possible path
length. For short path lengths in the range ≤ 0.3 m, contact
Siemens Technical Support.
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Siemens AP 01 · 2015
Note
Individual requirements for the measuring point can make the
utilization of special sensor equipment necessary. The possibilities for adapting the sensors are:
• Different purging media, such as instrument air, ambient air,
nitrogen or steam
• Different purging modes on process and sensor sides
• Special materials of purging tubes and/or sensor flanges
• Cooling or heating of the sensors
• Explosion-protected sensor configurations
Essential characteristics
• Integrated calibration adjustment with an internal reference
cell
• Negligible long-term drifts of zero and span
• Dynamic background correction for varying dust loads
• Isolated signal outputs, 4 to 20 mA
• User-friendly, menu-driven operation
• Selectable time constants (response time)
• Two user levels with individual access codes for prevention of
unwanted and unauthorized operations
• Operation according to NAMUR recommendations
• Monitoring of overall optical transmission
• Remote preventive maintenance and servicing via
Ethernet/modem
• Straightforward replacement of the central unit, since connections can easily be removed
• Sensor and central unit housing free of wear and corrosion
• Easy operation with a numerical keypad and menu prompting
Certified versions for emission monitoring
The LDS 6 is available as certified instrument for emission monitoring of NH3, NH3/H2O, H2O, HCl, HCl/H2O. The certificates
are issued by TÜV for Germany and MCERTS for the United
Kingdom. Test kits for ammonia, water and HCl should be used
to conduct regular calibration and linearity checks on site. These
kits can be ordered separately as instrument accessories. For
new analyzer orders, the NH3, NH3/H2O and H2O kits named
"Version 2" must be ordered. For already installed analyzers,
please contact Siemens Technical Support for spotting the correct kit version, or consult the instrument manual.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
General information
Verification of calibration
Assembly with certified, maintenance-free calibration gas cell
with connections for laser fiber-optic conductors and detector
module of cross-duct sensor. These are used to rapidly verify the
factory calibration in the field without compressed gas bottles
and flow cell.
Calibration verification kits are available for the following sample
gases: O2 (application codes AA, AC), NH3, CO, CO2, CO/CO2.
A "Zero gas test kit" is also available. (see "Additional units")
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Example of an assembly for verification of calibration
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ Technical specifications
Electrical characteristics
Analytical performance
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Power supply
Depending on sample gas component: see table for standard
applications.
For application code ET and FT:
in accordance with the requirements of 17th and 27th BImSchV
100 ... 240 V AC 50 ... 60 Hz,
automatically adapted by the system; with a 3-channel central unit,
an additional external power supply +24 V DC, 50 VA is included
in the scope of delivery
Power consumption
50 W
EMC
According to EN 61326 and standard classification of NAMUR
NE21
Depending on sample gas component: see table for standard
applications.
Electrical safety
According to EN 61010-1,
overvoltage classification II
Fuse specifications
100 ... 240 V: T2.5L250V
Measuring range
Depending on sample gas component: see table for standard
applications.
Detection limit (DL):
Calculated in accordance with
VDI 2449, measured on every supplied analyzer during the temperature test (between 5 ... 45 °C) in
accordance with VDI 4203.
Smallest recommended measuring
range (with 1 m path length)
The maximum applicable measuring ranges can be found in the table
of standard combinations. These can only be applied if the individual
process conditions allow it. Please contact the Technical Support from
Siemens for checking the applicability.
Accuracy1)
2 % / 5 %, depending on sample
gas component and application
code. At best: detection limit. See
table for standard applications.
For application code ET and FT:
in accordance with the requirements of 17th and 27th BImSchV
Linearity
Better than 1 %
Repeatability
2 % of the measured value or
same amount as the minimum
detection limit (whichever is largest)
For application code ET and FT:
in accordance with the requirements of 17th and 27th BImSchV
Calibration interval
No recalibration required thanks
to internal reference cell
General information
Dynamic response
Warm-up time at 20 °C ambient
temperature
Approx. 15 min
Response time
Min. of 1 s, depending on application
Integration time
1 … 100 s, adjustable
Influencing variables
Ambient temperature
< 0.5 %/10 K of the measured
value
Atmospheric pressure
Negligible
Process gas pressure compensation
Recommended
Process gas temperature compensation
Recommended
Process gas pressure range
See table for standard applications
Power supply changes
< 1 %/30 V
Electrical inputs and outputs
Concentration units
ppmv, Vol%, mg/Nm3
Number of measurement channels
1 … 3, optional
Display
Digital concentration display
(5 digits with floating decimal
point)
Analog output
2 per channel, 4 ... 20 mA, floating, ohmic resistance max. 750 Ω
Analog inputs
Laser protection class
Class 1, safe to the eye
2 per channel,
designed for 4 ... 20 mA, 50 Ω
Certificates
CE marking, TÜV, MCERTS
Binary outputs
6 per channel, with changeover
contacts, configurable, 24 V
AC/DC/1 A, floating
Degree of protection
IP20 according to EN 60529
Binary inputs
Dimensions
177 x 440 x 380 mm
6 per channel, designed for 24 V,
floating, configurable
Weight
Approx. 13 kg
Communication interface
Ethernet 10BaseT (RJ-45)
Horizontal
Climatic conditions
Design, enclosure
Mounting
Temperature range
5 … 45 °C during operation,
-40 … +70 °C during storage
and transportation
Atmospheric pressure
800 … 1 200 hPa
Humidity
< 85 % relative humidity,
above dew point
(in operation and storage)
1)
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Siemens AP 01 · 2015
The accuracy corresponds to intrinsic uncertainty according to IEC 61207
for 7MB6121-xKD00-0xxx
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Selection and ordering data
Article No.
7MB6121- 7 7 7 0 7 - 0 7 7 7
LDS 6 in-situ gas analyzer
19" rack unit for installation in cabinets
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Explosion protection
Without, not suitable for connection to Ex sensors
Without, suitable for connection to Ex sensors in accordance
with II 1 G Ex ia op is IIC T4 Ga, II 1 D Ex ia op is IIIC T135 °C Da
Measured component
0
1
2
O2
Possible with application code
of the respective channel
B, C, P
A
NH3
NH3/H2O
A, E, F, T
A, E, F, T
C
D
HCl
HCl/H2O
A, H, T
A, H, T
E
F
HF
HF/H2O
A, H
A, H
G
H
CO
CO/CO2
C
D
J
K
CO2
H2O
A
A, T
L
M
Application code of
measured component channel 1
A
B
Application examples channel 11)
Emission monitoring, non-certified
Emission monitoring, combustion
optimization
A
B
C
D
Safety monitoring with appropriate
plant concept
Process control
E
F
SNCR-DeNOx
SCR-DeNOx
E
F
H
L
Filter optimization
Automotive, for use according EU regulation
No. 595/2009/EC from June 18, 2009 (EURO VI)
Process control (high pressure)
H
L
Emission monitoring, QAL1 according
EN 15267-3 (TÜV and MCERTS), in combination with measured component variants
C, D, E, F, M
T
C
P
T
CD 6, sensor alignment kit
With
Without
Application code of
measured component channel 2
X
A
B
D
P
0
1
Application examples channel 21)
Channel 2 not used
Emission monitoring
Combustion optimization
X
A
B
C
D
Safety monitoring with appropriate
plant concept
Process control
E
F
SNCR-DeNOx
SCR-DeNOx
E
F
H
L
Filter optimization
Automotive, for use according EU regulation
No. 595/2009/EC from June 18, 2009 (EURO VI)
Process control (high pressure)
H
L
Emission monitoring, QAL1 according
EN 15267-3 (TÜV and MCERTS), in combination with measured component variants
C, D, E, F, M
T
C
P
T
1)
D
P
The examples shown represent possible applications where appropriately configured LDS 6 solutions can be used. The user is responsible for the prevailing
conditions (plant concept (possibly redundant), application of appropriate components required in addition, compliance with possible directives, etc.).
Siemens AP 01 · 2015
2/11
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Selection and ordering data
Article No.
7MB6121- 7 7 7 0 7 - 0 7 7 7
LDS 6 in-situ gas analyzer
19" rack unit for installation in cabinets
Application code of
measured component channel 3
2
X
A
B
Application examples channel 31)
External 24 V DC power supply
included in scope of delivery
Channel 3 not used
Emission monitoring
Combustion optimization
X
A
B
C
D
Safety monitoring with appropriate
plant concept
Process control
E
F
SNCR-DeNOx
SCR-DeNOx
E
F
H
L
Filter optimization
Automotive, for use according EU regulation
No. 595/2009/EC from June 18, 2009 (EURO VI)
Process control (high pressure)
H
L
Emission monitoring, QAL1 according
EN 15267-3 (TÜV and MCERTS), in combination with measured component variants
C, D, E, F, M
T
C
P
T
D
P
Language (supplied documentation, software)
German
English
French
Spanish
Italian
Selection and ordering data
Additional versions
Add "-Z" to Article No. and specify Order code
Telescopic rails (2 units)
Set of Torx tools
TAG labels (customized inscription)
Additional units
Optical band-pass filter for suppressing IR background radiation (flame filter)
External power supply for hybrid cable length > 500 m
Calibration verification kit for NH3 (version 2)
TÜV/MCERTS linearity verification kit NH3 (version 2), 2 cells
TÜV/MCERTS linearity verification kit NH3/H2O (version 2), 3 cells
TÜV/MCERTS linearity verification kit H2O (version 2), 2 cells
Calibration verification kit for NH3 (version 1)
TÜV/MCERTS linearity verification kit NH3 (version 1), 2 cells
TÜV/MCERTS linearity verification kit NH3/H2O (version 1), 3 cells
TÜV/MCERTS linearity verification kit H2O (version 1), 2 cells
TÜV/MCERTS linearity verification kit HCl, 2 cells
TÜV/MCERTS linearity verification kit HCl/H2O, 3 cells
TÜV/MCERTS linearity verification kit H2O (only for HCl/H2O analyzers), 5 cells
TÜV/MCERTS linearity verification kit H2O (only for NH3/H2O analyzers), version 1,
5 cells
TÜV/MCERTS linearity verification kit H2O (only for NH3/H2O analyzers), version 2,
5 cells
TÜV/MCERTS linearity verification kit HCl, 5 cells
TÜV/MCERTS linearity verification kit NH3, version 1, 5 cells
TÜV/MCERTS linearity verification kit NH3, version 2, 5 cells
Linearity verification kit NH3 (version 2), 10 cells2)
Calibration verification kit for O2 (only for application codes AA, AC and AD)
Calibration verification kit for CO
Calibration verification kit for CO2
Calibration verification kit for CO/CO2
Zero gas verification kit for all gases except O2
1)
0
1
2
3
4
Order code
A31
A32
Y30
Article No.
A5E00534668
A5E00854188
A5E01075594
A5E00823339013
A5E00823339014
A5E00823339015
A5E00534675
A5E00823339003
A5E00823339004
A5E00823339005
A5E00823339008
A5E00823339009
A5E00823339007
A5E00823339002
A5E00823339012
A5E00823339006
A5E00823339001
A5E00823339011
A5E03693426
A5E01143755001
A5E01143755003
A5E01143755004
A5E01143755006
A5E00823386009
The examples shown represent possible applications where appropriately configured LDS 6 solutions can be used. The user is responsible for the prevailing
conditions (plant concept (possibly redundant), application of appropriate components required in addition, compliance with possible directives, etc.).
2)
In combination with the LDS 6 applications CL/DL suitable to measure NH3 according to the requirements of "Regulation No. 595/2009/EC on type-approval
of motor vehicles and engines with respect to emissions from heavy duty vehicles (EURO VI) from June 18, 2009 and its implementation standard the regulation 582/2011/EC from May 25, 2011” of the Commission of the European Community.
2/12
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ Dimensional drawings
s
101.6
178
2
LDS 6
355
465
483
428
351.5
177
432
437
483
440
LDS 6, 19" central unit, dimensions in mm
Siemens AP 01 · 2015
2/13
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ Schematics
Pin assignments
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0
2
0
0
0
*1'
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1&
*1'
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99
99
68%'FRQQHFWRU')
0
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5HOD\
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FRQWDFWDUUDQJHPHQWVKRZQ
5HOD\
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*1'
*1'
LDS 6, 19" central unit, pin assignments
2/14
Siemens AP 01 · 2015
&RQWDFWORDG
PD[9$$&'&
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Optical and electrical connections
25-pin connector:
Binary inputs and
relay outputs
15-pin connector:
Binary inputs and
analog inputs/outputs
2
Ethernet
converter
RJ-45
Power supply
and fuses
Hybrid cable
support
E2000
single mode
opto-connector
SMA
multimode
opto-connector
24 V DC
sensor
supply
LDS 6, three-channel 19" central unit, optical and electrical connections
Siemens AP 01 · 2015
2/15
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
■ More information
The following table lists the measuring conditions for standard
applications. The listed values for the measuring range and detection limit (DL) are only approximate values. The exact values
at the respective measuring point depend on the totality of all influencing variables and can be determined by Siemens for the
specific case.
2
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load2):
< 50 g/Nm3
Process gas
temperature
Tmin … Tmax
Gas Gas Gas Appl.
1
2
code code
A
O2
C
NH3
NH3 H2O D
E
HCl
HCl
H2O F
Min.
measuring
range
(with 1 m eff.
opt. path
length)
Max. measuring (Max. measurrange
ing range x
(also dependent path length)
on eff. opt. path
length:
see following column)
(DL x path
length)
under standard conditions1)
without
cross-interference of
other gases
(DL x path Acculength)
racy3)
at 1 013 hPa
with crossinterference
of gas 2
Gas 1
Gas 1
Gas 1
Gas 1
Gas 1
Gas 1
B6)
600 … 1 200 °C 950 … 1 050 hPa 0 … 15 vol% 0 … 100 vol%
240 vol%*m
0.3 vol%*m
at 600 °C
5%
C
0 … 600 °C
950 … 1 050 hPa 0 … 5 vol%
0 … 100 vol%
75 vol%*m
0.1 vol%*m
2 %4)
P
0 … 200 °C
950 … 5 000 hPa 0 … 5 vol%
0 … 100 vol%
75 vol%*m
0.1 vol%*m
2%
A
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
T
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
E
250 … 350 °C
950 … 1 050 hPa 0 … 45 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.9 ppmv*m
at 250 °C
1.4 ppmv*m 2 %
at 15 Vol%
H2O, 250 °C
F
300 … 400 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 500 ppmv
2 500 ppmv*m
1 ppmv*m
at 300 °C
1.5 ppmv*m 2 %
at 15 Vol%
H2O, 300 °C
L7)
0 … 400 °C8)
920 … 1 120 hPa 0 … 15 ppmv 0 … 500 ppmv
2 500 ppmv*m
0.5 ppmv*m
1.4 ppmv*m 2 %
at 15 Vol%
H2O, 250 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
T
0 … 150 °C
950 … 1 050 hPa 0 … 25 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.5 ppmv*m
0.9 ppmv*m 2 %
at 15 vol%
H2O, 55 °C
E
250 … 350 °C
950 … 1 050 hPa 0 … 45 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.9 ppmv*m
at 250 °C
1.4 ppmv*m 2 %
at 15 vol%
H2O, 250 °C
F
300 … 400 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 100 ppmv
1 200 ppmv*m
1 ppmv*m
at 300 °C
1.5 ppmv*m 2 %
at 15 vol%
H2O, 300 °C
L7)
0 … 400 °C8)
920 … 1 120 hPa 0 … 15 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.5 ppmv*m
1.4 ppmv*m 2 %
at 15 Vol%
H2O, 250 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 30 ppmv 0 … 6 000 ppmv 1 200 ppmv*m
0.6 ppmv*m
2.2 ppmv*m 5 %
at 15% H2O,
55 °C
T
120 … 210 °C
950 … 1 050 hPa 0 … 10 ppmv 0 … 60 ppmv
H
150 … 250 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 6 000 ppmv 1 200 ppmv*m
1.0 ppmv*m
at 150 °C
3.1 ppmv*m 5 %
at 15 Vol%
H2O, 150 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 30 ppmv 0 … 100 ppmv
1 200 ppmv*m
0.6 ppmv*m
2.2 ppmv*m 5 %
at 15% H2O,
55 °C
T
120 … 210 °C
950 … 1 050 hPa 0 … 10 ppmv 0 … 60 ppmv
720 ppmv*m
H
150 … 250 °C
950 … 1 050 hPa 0 … 50 ppmv 0 … 100 ppmv
1 200 ppmv*m
1.0 ppmv*m
at 150 °C
3.1 ppmv*m 5 %
at 15 vol%
H2O, 150 °C
Footnotes: See page 2/18.
2/16
Process gas
pressure
pmin … pmax
Please note that the values for the detection limit and the maximum measuring range refer to a path length of 1 m. Longer path
lengths will improve the detection limit, but not linearly. due to
limiting effects such as dust load. The maximum applicable
measuring ranges can only be used if permitted by the process
conditions such as dust load.
Siemens AP 01 · 2015
720 ppmv*m
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load3): < 50 g/Nm3
Min. measuring
range
(with 1 m eff. opt.
path length)
Max. measuring range
(usually also
dependent on
eff. opt. path
length: see
following
column)
(Max.
measuring
range x
path
length)
(DL x path
length)
under
standard
conditions
(DL x path
Acculength)
racy4)
at 1 013 hPa
with crossinterference
of gas 1
Purging gas
mode
Gas 2
Gas 2
Gas 2
Gas 2
Standard
Optional
B6)
E, F
G, H
Steam +
air, N2
C
D
B
N2
P
D
B
N2
A
C
G
Air
T
C
G
Air
E
E
G
Air
F
E
G
Air
L
C
D
Air
Gas 1 Gas 2 Gas Appl. Gas 2
code code
A
O2
C
NH3
NH3
H2O
E
HCl
HCl
D
H2O
F
1) 2)
Gas 2
Purging
gas
medium
A
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
0.1 vol%*m
5%
C
G
Air
T
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
0.1 vol%*m
5%
C
G
Air
E
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
at 250 °C
0.1 vol%*m
at 250 °C
5%
E
G
Air
F
0 … 5 vol%
0 … 30 vol%
240 vol%*m 0.1 vol%*m
at 300 °C"
0.1 vol%*m
at 300 °C"
5%
E
G
Air
L
0 … 5 vol%
0 … 30 vol%
250 vol%*m 0.1 vol%*m
at 250 °C"
0.1 vol%*m
at 250 °C"
5%
C
D
Air
A
C
G
Air
T
C
G
Air
H
E
G
Air
C
G
Air
C
G
Air
E
G
Air
A
0 … 5 vol%
0 … 30 vol%
360 vol%*m 0.1 vol%*m
T
0 … 5 vol%
0 … 30 vol%
360 vol%*m
H
0 … 5 vol%
0 … 30 vol%
360 vol%*m 0.1 vol%*m
at 150 °C
0.1 vol%*m
5%
0.1 vol%*m
at 150 °C
5%
Footnotes: See page 2/19.
Siemens AP 01 · 2015
2/17
2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load2):
< 50 g/Nm3
2
Process gas
temperature
Tmin … Tmax
Gas Gas Gas Appl.
1
2
code code
G
HF
HF
H2O H
Process gas
pressure
pmin … pmax
Min.
measuring
range
(with 1 m eff.
opt. path
length)
Max. measuring (Max. measurrange
ing range x
(also dependent path length)
on eff. opt. path
length:
see following column)
(DL x path
length)
under standard conditions1)
without
cross-interference of
other gases
(DL x path Acculength)
racy3)
at 1 013 hPa
with crossinterference
of gas 2
Gas 1
Gas 1
Gas 1
Gas 1
0.6 ppmv*m 5 %
at 15 vol%
H2O, 55 °C
Gas 1
Gas 1
A
0 … 150 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 1 500 ppmv 200 ppmv*m
0.1 ppmv*m
H
150 … 250 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 1 500 ppmv 200 ppmv*m
0.11 ppmv*m 0.6 ppmv*m 5 %
at 150 °C
at 15 vol%
H2O, 150 °C
A
0 … 150 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 200 ppmv
200 ppmv*m
0.1 ppmv*m
H
150 … 250 °C
950 … 1 050 hPa 0 … 5 ppmv
0 … 200 ppmv
200 ppmv*m
0.11 ppmv*m 0.6 ppmv*m 5 %
at 150 °C
at 15 vol%
H2O, 150 °C
300 ppmv*m 1 500 ppmv 2 %
*m
at 50 vol%
CO2, 20 °C
0.6 ppmv*m 5 %
at 15 vol%
H2O, 55 °C
CO
J
C
0 … 600 °C
950 … 1 050 hPa 0 … 1.5 vol% 0 … 100 vol%
40 vol%*m
CO
CO2 K
D
0 … 400 °C
800 …1 400 hPa 0 … 5 vol%
0 ... 200 vol%*m 0,1 vol%*m
CO2
L
A
0 … 150 °C
950 … 1 050 hPa 0 … 7.5 vol% 0 … 100 vol%
40 vol%*m
300 ppmv*m
2%
H2O
M
A
0 … 150 °C
950 … 1 050 hPa 0 … 5 vol%
0 … 30 vol%
240 vol%*m
0.1 vol%*m
5%
T
0 … 150 °C
950 … 1 050 hPa 0 … 5 vol%
0 … 30 vol%
240 vol%*m
0.1 vol%*m
5%
0 … 100 vol%
0.5 Vol%
at 50 vol%
CO2, 20 °C
2 %5)
1)
All technical data apply to an optical path distance of 1 m in a nitrogen atmosphere under standard conditions 25 °C (or Tmin) and 1 013 hPa. The effective
detection limit, the measuring range and the accuracy can be influenced by process parameters such as pressure, temperature and gas composition. Not all
combinations of maximum pressure and temperature can be realized with the minimum measuring ranges. If the process conditions deviate from the specifications of the standard applications, special applications are also possible on request.
Please complete the application questionnaire which can be found on the Internet at www.siemens.com/insituquestionnaire.
2)
At 0.3 m effective optical path length, average diameter of the dust particles: 15 µm, specific weight of the dust particles: 650 kg/m3
3)
At least: Detection limit
4)
Up to 200 °C, 5 % above this
5)
The accuracy corresponds to intrinsic uncertainty according to IEC 61207: 2 % of MV (0 ... 200 °C); 2.5 % of MV (0 ... 400 °C); at best 0.25 vol%*m.
6)
At high process temperatures, the use of an IR filter A5E00534668 is recommended for the CD 6 sensor (see page 2/26).
7)
Suitable to measure NH3 according to the requirements of "Regulation No. 595/2009/EC on type-approval of motor vehicles and engines with respect to emissions from heavy duty vehicles (EURO VI) from June 18, 2009 and its implementation standard the regulation 582/2011/EC from May 25, 2011" of the Commission of the European Community.
8)
The analyzer can measure at temperatures above 400 °C up to 1 000 °C. As NH3 will decompose at higher temperature levels no analyzer specification can
be given for these temperature ranges.
2/18
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
19" central unit
Standard application
Effective optical path
length: 0.3 … 12 m
Dust load3): < 50 g/Nm3
Min. measuring
range
(with 1 m eff. opt.
path length)
Max. measuring range
(usually also
dependent on
eff. opt. path
length: see
following
column)
(Max.
measuring
range x
path
length)
(DL x path
length)
under standard conditions1) 2)
(DL x path
Acculength)
racy4)
at 1 013 hPa
with crossinterference
of gas 1
Purging gas
mode
Gas 2
Gas 2
Gas 2
Gas 2
Standard
Optional
A
C
G
Air
H
E
G
Air
Gas 1 Gas 2 Gas Appl. Gas 2
code code
G
HF
HF
H2O
H
0.1 vol%*m
Gas 2
Purging
gas
medium
2
A
0 … 5 vol%
0 … 30 vol%
360 vol%*m 0.1 vol%*m
5%
C
G
Air
H
0 … 5 vol%
0 … 30 vol%
360 vol%*m 300 ppmv*m 300 ppmv*m 5 %
at 200 °C
at 200 °C
E
G
Air
E
G
Air, N2
C
G
Air
J
C
K
D
CO2
L
A
C
G
Air
H2O
M
A
C
G
Air
T
C
G
Air
CO
CO
CO2
0 … 10 vol%
0 … 100 vol% 0 ... 200
vol%*m
0.2 vol%*m
1 vol%
at 50 vol%
CO, 20 °C
5 %5)
1)
At 20 °C, 1 013 hPa
2)
If the smallest permissible process gas temperature of the application is Tmin > 20 °C, the detection limit refers to Tmin and standard pressure (1 013 hPa)
3)
At 0.3 m optical path length, average diameter of the dust particles: 15 µm, specific weight of the dust particles: 650 kg/m3
4)
At least: Detection limit
5)
The accuracy corresponds to intrinsic uncertainty according to IEC 61207: 5 % of MV; at best 0.5 vol%*m.
6)
At high process temperatures, the use of an IR filter A5E00534668 is recommended for the CD 6 sensor (see page 2/26).
Special applications
If the process conditions deviate from the specifications of the standard applications, special applications are also possible on request. Please complete the application questionnaire which can be found at
www.siemens.com/insituquestionnaire on the Internet.
Siemens AP 01 · 2015
2/19
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
■ Overview
Cross-duct sensors CD 6 and cables for non-Ex applications
2
The standard cross-duct sensor consists of a transmitter unit
and a detector unit with the same dimensions. The transmitter
unit provides a connector for the fiber-optic cable. The laser light
is transmitted through this cable. The receiver unit contains a
photodetector and an electronics PCB, and is connected to the
detector unit by a sensor cable.
The most important sensor purging configurations are presented
below:
Purging on the process side with moderate flow
Is selected e.g. for pure gas applications, emission monitoring,
inerting monitoring. The purging gas flow can be adjusted between 0 and approx. 120 l/min at each sensor head using a needle valve (included in delivery).
The sensors are mounted onto flanges. The easiest way to avoid
condensation and dust deposits on the sensor windows is to use
a purging gas, e.g. with instrument air. Purging must be selected
depending on the application. The cross-duct sensors can
therefore be configured for the respective situation. The application reference table provides recommendations for suitable
purging with standard applications.
If a component is to be measured which is also present in measurable quantities in the purging medium - such as oxygen or
moisture - it is necessary to use purging gases such as nitrogen,
superheated process steam or similar. In such cases it is usually
also necessary to purge the sensor heads, since the ambient air
must also be displaced here out of the laser beam path. A differentiation is therefore made between purging on the process side
and purging on the sensor side.
Note: For measurement of O2 at gas temperatures above
600 °C, it may also be possible to tolerate air as the purging medium since its influence on the measurement can be compensated.
Applications with oxygen (high-pressure)
For oxygen measurements with a higher process gas pressure
(1 to 5 bar), the sensor CD 6 can be used together with a highpressure window flange as the process connection. This window
flange is also available in the standard sizes DN 65/PN 6,
DN 80/PN 16 or ANSI 4"/150 lbs. The optical surface to the process is made of borosilicate glass. High-pressure window
flanges can be equipped with window purging, but without purging tubes. Possible purge modes for the window flanges are
"A-C" (no purging or moderate purging on the process side).
Window flanges are tested for leakage before delivery using
overpressure, and show leakage rates of less than 10-5 mbar⋅l/s.
For ordering this application, the MLFB code of the central unit
with the application code "P" must be selected. The process interface suitable for the sensors can be chosen by selection of
the corresponding code in the 6th configurable position of the
MLFB number.
Moderate purging on the process side
Purging on the process side with increased flow
Through omission of needle valve. This type of purging is selected in crude gas applications with higher concentrations of
particles and/or condensation as well as in non-purified flue
gases in combustion plants. The purging gas flow is typically set
between 200 and 500 l/min on each sensor head depending on
the input pressure of the purging medium.
Increased purging on the process side
Purging on the process side with high flow
Through use of air blower or dry process steam. Connectors with
hose adapters are included in the delivery. An additional
Swagelok adapter must be ordered if a high flow of steam or instrument air purging is required (option A27). This type of purging is selected in crude gas applications with very high concentrations of particles and/or condensation such as in the furnaces
of combustion plants. If instrument air is not available, an air
blower is also an alternative for purging in applications with
lower demands. On the process side, dry steam can be used as
the inert purging gas instead of nitrogen (Tmax 240 °C). The
purging gas flow is automatically set between 500 and
< 1 000 l/min on each sensor head depending on the purging air
blower or the steam pressure.
2/20
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
2
Increased purging on the process side, with hose connection adapter
Purging on sensor side
Can be combined with any purging mode on the process side,
and is always selected if the ambient air must never have an influence on the measurement. The volumes within the sensor
head are then continuously purged with an O2-free gas (with
H2O-free gas in the case of moisture measurement).
Note
With purging on the process side, it may be necessary to use
non-return valves to ensure no process gas can enter the purging gas line in the event of failure of the purging gas supply. This
applies especially in the case of cascaded process and sensor
purging where there is otherwise the danger that, for example,
corrosive process gases could enter the sensor enclosure.
Sensor configuration with high purging on the process side, with 6 mm
joint for use with steam, and with N2 purging on the sensor side
The purging media used on the process side flow through purging gas tubes into the process gas flow. The tubes extend a few
centimeters into the process area, and usually receive a flow of
process gas from the side. This results in a wedge being generated in the inlet zone of the purging gas. The effective measuring
path in the process gas is therefore well-defined as the distance
between the ends of the two purging gas inlet tubes.
Cross-duct sensor CD 6: Options and accessories
Sensor alignment kit
Includes a battery-operated visible light source, a centering aid
with crosshair, and two hook spanners for opening the optics
tube of the sensors.
Please note: the sensor alignment kit is not explosion protected.
125 ... 375 mm
typ. 0 ... 25 mm
Process wall
2° (maximum)
Process flange
Process wall thickness
(incl. insulation)
DN 65/PN 6
or ANSI 4"/150 lbs
Installation requirements for the cross-duct sensors CD 6
Siemens AP 01 · 2015
2/21
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Purging air blower
Two purging air blowers are required to purge the sensor heads.
Both 230 V AC and 115 V AC versions can be ordered.
Electrical connections:
230 V AC 50 Hz
or 115 V AC 60 Hz
2
Ø12
Air
filter
1 ¼” hose connection
CD 6 sensor for
blower air purging
Sensor configuration with purging air blower
Flow cell (available on special application)
For implementation of measuring configurations with bypass
mode. The cell consists of a stainless steel tube whose internal
surfaces are coated with PTFE to minimize surface effects. With
an effective measuring path of 1 m, the inner volume is only 1.2 l,
and fast gas displacement times can therefore be achieved. The
flow of sample gas can be from the ends or from the center of
the tube, since appropriate 6 mm joints are present here. The
flow cell can be ordered in four configurations:
• Unheated, including assembly for wall mounting
• Unheated, including assembly for wall mounting and a 19"
housing with an air jet pump with a delivery rate of max.
30 l/min
• As above, but can be heated up to approx. 200 °C
• As above, but can be heated up to approx. 200 °C and
mounted on a rack with wheels and integrated 19" frame
Optical bandpass filter (only for O2 CD 6)
Serves to protect the light-sensitive detector in the receiver unit
of the sensor from saturation by IR background radiation. Is used
with measurements in very hot process gases (T > 1 000 °C) or
with unavoidable appearances of flames in the measurement
path.
2/22
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
■ Technical specifications
Accessories
Cross-duct sensor CD 6
General information
Purging
Design
Transmitter and detector units,
connected by a sensor cable
Materials
Stainless steel (1.4305/303),
aluminum
Installation
Vertical or parallel to the gas flow
Laser protection class
Class 1, safe to the eye
Explosion protection
II 1 G Ex ia op is IIC T4 Ga,
II 1 D Ex ia op is IIIC T135 °C Da
A defined leak rate can only be
guaranteed when using highpressure window flanges. Otherwise it may be necessary for the
owner to carry out an evaluation
in accordance with ATEX
DEMKO 06 ATEX 139648X;
IECEx UL 13.0029X
Nitrogen is permissible as the purging gas for the sensor side. Nitrogen,
steam, air and gases which are not subject to the pressure equipment
directive Cat. 2 are permissible as purging gases for the process side.
2
Purging with instrument air, N2
• Max. overpressure in the sensor
< 500 hPa
• Quality
- Instrument air
According to
ISO 8573-1:2010 [2:3:3]
Note: It is sufficient if the pressure
condensation point is min. 10 K
below the minimum ambient temperature.
- Nitrogen
Purity better than 99.7 %. For oxygen measurements, an O2 content < 0.01 % in the purging gas
(optical path length ≥ 1 m, min.
5 % oxygen in the process gas)
Design, enclosure
Degree of protection
IP65
Dimensions
Diameter: 163, L: 450 mm
Purging gas tube in mm
400 (370 net) x 44 x 40
800 (770 net) x 54 x 40
1 200 (1 170 net) x 54 x 40
Weight
2 x approx. 11 kg
Blower purging
Mounting
DN 65/PN 6, DN 80/PN 16,
ANSI 4"/150 lbs
• Maximum counter pressure
40 hPa
• Maximum flow rate
850 l/min
• Power consumption
370 W
• Degree of protection (fan)
IP54, cover required to protect
against rain
• Maximum flow rate
(process purging)
500 l/min
• Dew point
Benchmark: < -10 °C, condensation on the optics must be
avoided
Please note:
• For purging tubes with a length of 800 and 1 200 mm, the wall thickness
must not exceed 200 mm with DN 65/PN 6 connections. To carry out
measurements with thicker walls, please contact Siemens.
• The optimum adjustment of the flanges can change with high
differences in temperature between the process and environment
depending on the type of assembly.
• Steam conditioning
Overheated
Electrical characteristics
• Maximum temperature
240 °C
• Minimum pressure
> 4 000 hPa
• Maximum pressure
16 000 hPa, refers to a volume
flow of approx. 1 100 l/min
Power supply
Power consumption
24 V DC, supply from central unit
via hybrid cable
< 2 W during operation,
max. 0.6 W with Ex configuration
Steam purging
Climatic conditions
Sensor temperature
• Non-Ex
-20 ... +70 °C during operation,
-30 ... +70 °C during storage and
transportation
• Ex
-20 ... +60 °C during operation,
-30 ... +70 °C during storage and
transportation
Humidity
< 95 % RH, above dew point
Pressure
800 ... 1 100 hPa
Temperature range on the sensor
side of the process interface (connection plate)
-20 … +70 °C
Measuring conditions
Measurement path
0.3 ... 12 m (other lengths on
request)
Dust load
The influence of dust is very complex and depends on the path
length and particle size. The optical attenuation increases exponentially at longer path lengths.
Smaller particles also have a
large influence on the optical
attenuation. With high dust load,
long path length and small particle size, the technical support at
Siemens should be consulted.
Siemens AP 01 · 2015
2/23
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Hybrid and sensor cables
General information
Configuration hybrid cable
Two optical fibers and two twisted
copper wires in one cable for
24 V DC. Single-mode optical
fiber configured at both ends with
E2000 angle connectors. Multimode optical fiber configured at
both ends with SMA connectors.
Cable is flame-retardant, very
good resistance to oil, gasoline,
acids and alkalis, outer sheath
UV-resistant
Cable sheath
Oil-resistant polyurethane
Dimensions
• For > 500 m, an external power
supply must be additionally ordered
• For installation in hazardous
zones, non-intrinsically-safe cables have to be spatially separated from intrinsically-safe lines
• Diameter
< 8.5 mm
• Length
• Use in non-hazardous and
Ex Zone 2: Up to 700 m
• Use in Ex Zone 0 and Zone 1:
Up to 250 m
Weight
75 kg/km
Maximum tensile force
200 N
Maximum lateral pressure
1 000 N/cm
Impact resistance
200 N/cm
Maximum tensile strength
500 N
Minimum bending radius
12 cm
2
Climatic conditions
Ambient temperature
-40 ... +70 °C during transport,
storage and operation
-5 ... +50 °C during laying
Humidity
< 95 % rel. humidity, above dew
point (in operation and storage)
2/24
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Selection and ordering data
LDS 6 in-situ gas analyzer
Pair of sensors (cross-duct sensor)
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Explosion protection
Without
II 1 G Ex ia op is IIC T4 Ga, II 1 D Ex ia op is IIIC T135 °C Da
Sensor type
Standard cross-duct sensor
Measured component
O2
All gases except O2
Purging, process side
Without purging
Sensor side
Without purging
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Without purging
Instrument air or N2
Reduced flow: 0 ... 120 l/min
incl. needle valve, 6 mm Swagelok
Air or N2
Increased flow: 200 ... 500 l/min
incl. 6 mm Swagelok
Air, fan or steam;
high flow: > 500 l/min
incl. 1¼" hose adapter
Article No.
7MB6122- 7 7 7 7 7 - 7 7 7 7
0
1
2
A
W
A
B
C
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Without purging
D
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Without purging
F
Air or N2, 1 to 2 l/min;
incl. needle valve, 6 mm Swagelok
Purging tubes, material
No purging tubes
Stainless steel, EN 1.4432/316L
Purging tubes, length
No purging tubes
400 mm
800 mm
1 200 mm
75 mm, e.g. for engine test rigs
Process connection
Stainless steel flange (1.4404/316L),
connection dimension DN 65/PN 6, MAWP (PS) @ 20 °C: 0.05 MPa
Stainless steel flange (1.4404/316L),
connection dimension ANSI 4"/150 lbs, MAWP (PS) @ 20 °C: 7.25 psi
Stainless steel flange (1.4404/316L),
connection dimension DN 65/PN 6, MAWP (PS) @ 20 °C: 0.05 MPa,
incl. enclosed welding flanges, e.g. for engine test rigs
Pressure-resistant window flange (1.4404/316L, borosilicate glass),
connection dimension DN 65/PN 6, MAWP (PS) @ 20 °C: 0.6 MPa
Pressure-resistant window flange (1.4404/316L, borosilicate glass),
connection dimension DN 80/PN 16, MAWP (PS) @ 20 °C: 1.6 MPa
Pressure-resistant window flange (1.4404/316L, borosilicate glass),
connection dimension ANSI 4"/150 lbs, MAWP (PS) @ 20 °C: 232 psi
Hybrid cable
Length [m]
No hybrid cable
Standard length
5
10
25
40
50
Customized length
(specified in complete meters)
E
G
H
0
1
0
1
2
3
4
0
1
2
3
4
5
X
A
B
E
G
H
Z
Siemens AP 01 · 2015
2/25
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Selection and ordering data
LDS 6 in-situ gas analyzer
Pair of sensors (cross-duct sensor)
Sensor connecting cable
No sensor connecting cable
Standard length
2
Customer-specific length
Language (supplied documentation)
German
English
French
Spanish
Italian
Article No.
7MB6122- 7 7 7 7 7 - 7 7 7 7
Length [m]
Selection and ordering data
Additional versions
Add "-Z" to Article No. and specify Order code
6 mm Swagelok adapter for purging with steam, purging modes G and H
Acceptance test certificate 3.1 (leak test) in accordance with EN 10204
(only in combination with pressure-resistant window flanges)
Acceptance test certificate 3.1 (material certificate) in accordance with EN 10204
(only in combination with pressure-resistant window flanges)
Hybrid cable, customized length
Sensor cable, customized length
TAG label, customized inscription
Additional units
Purging air blower 230 V
Purging air blower 115 V
CD 6, sensor alignment kit
Optical filter for reducing IR background radiation (flame filter), only O2
2/26
Siemens AP 01 · 2015
X
A
B
E
Z
5
10
25
(specified in complete meters)
0
1
2
3
4
Order code
A27
C12
C13
P1Y
Q1Y
Y30
Article No.
A5E00829151
A5E00829150
A5E00253142
A5E00534668
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
■ Dimensional drawings
Ø 163
2
395
395
105
105
Ø 163
Ø 44.5 at 400 length
Ø 54 at 800, 1 200 length
Cross-duct sensor CD 6, moderate purging (instrument air), version
according to Article No. 7MB6122-**C1*-0***, dimensions in mm
400 (800, 1 200)
370 (770, 1 170)
Process flange
(provided by
customer)
400 (800, 1 200)
370 (770, 1 170)
Ø 6 mm fitting
Process flange
(provided by
customer)
Ø 44.5 at 400 length
Ø 54 at 800, 1 200 length
Cross-duct sensor CD 6, increased purging (instrument air), version
according to Article No. 7MB6122-**E1*-0***, dimensions in mm
Siemens AP 01 · 2015
2/27
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Ø 163
2
105
105
Ø 163
395
395
Test valve
1¼” hose (OD)
Ø 44.5 at 400 length
Ø 54 at 800, 1 200 length
Cross-duct sensor CD 6, blower purging, version according to
Article No. 7MB6122-**G1*-0***, dimensions in mm
2/28
Siemens AP 01 · 2015
Process flange
(provided by
customer)
400 (800, 1200)
Process flange
(provided by
customer)
370 (770, 1170)
400 (800, 1 200)
370 (770, 1 170)
Ø 6 mm fitting
Ø 44.5 at 400 length
Ø 54 at 800, 1200 length
Cross-duct sensor CD 6, sensor and process side purging, version
according to Article No. 7MB6122-**H1*-0***-Z A27, dimensions in mm
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Cross-duct sensor CD 6
Ø 163
š
105
431
2
Fitting
for Ø 6 mm
OD hose
High pressure flange
Check valve
Cross-duct sensor CD 6, purged version according to
Article No. 7MB6122-*WC14-2***, dimensions in mm
CD 6 high-pressure sensor for oxygen, dimensions in mm
Siemens AP 01 · 2015
2/29
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
LDS 6
Documentation
■ Selection and ordering data
Manual
Article No.
LDS 6 manual
2
• German
A5E00295893
• English
A5E00295894
• French
A5E00295895
• Italian
A5E00295896
• Spanish
A5E00362720
Suggestions for spare parts
■ Selection and ordering data
Description
Quantity for
2 years
Quantity for
5 years
Article No.
CD 6, window module, quartz
1
2
A5E00338487
CD 6, window module, engine test rig, no purging
1
2
A5E00338490
CD 6, high-pressure window flange (1.4404/316L), DN 65/PN 6
1
2
A5E00534662
CD 6, high-pressure window flange (1.4404/316L), DN 80/PN 16
1
2
A5E00534663
CD 6, high-pressure window flange (1.4404/316L), ANSI 4"/150 lbs
1
2
A5E00534664
Gasket for CD 6 hybrid cable
1
2
A5E00853911
CD 6, sensor electronics FO InGaAs (version 2)
1
1
A5E01090409
CD 6, sensor electronics FO Ge, only HCl (version 2)
1
1
A5E01090413
CD 6, sensor electronics SW, only O2
1
1
A5E00338533
CD 6, sensor electronics ATEX SW, only O2
1
1
A5E00338563
CD 6, sensor electronics ATEX HCI
1
1
A5E00853896
CD 6, sensor electronics ATEX NH3, CO, CO2, HF, H2O, low gain
1
1
A5E00338572
CD 6, purging tube 400 mm 1.4432/316L
1
2
A5E00253111
CD 6, purging tube 800 mm 1.4432/316L
1
2
A5E00253112
CD 6, purging tube 1200 mm 1.4432/316L
1
2
A5E00253113
■ More information
For demanding applications it is recommended to keep purging
tubes, window modules and detector electronics in stock (quantities stated per measuring point, i.e. per pair of sensors).
2/30
Siemens AP 01 · 2015
For the suitability of different parts (version 1 or version 2) please
consult the instrument manual or contact Siemens directly. In
general, all new analyzers are compatible with spare parts of
version 2.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
■ Overview
SITRANS SL is a diode laser gas analyzer with a measuring principle based on the specific light absorption of different gas components. SITRANS SL is suitable for fast, non-contact measurement of gas concentrations in process or flue gases. An analyzer
consisting of transmitter and receiver units (sensors) is used for
each measuring point. The hardware for further processing of
the measured signal into a concentration value, as well as the
monitoring, control and communication functions, are integrated
in these two main modules. The sensors are designed for operation under harsh environmental conditions.
■ Application
Applications
• Control of combustion processes
• Process optimization
• Plant and operator safety
• Process measurements in all types of power and combustion
plants
• Process control
• Explosion protection
• Measurements in corrosive and toxic gases
• Quality control
Sectors
• Chemical and petrochemical plants
• Power plants
• Waste incinerators
• Iron and steel industry
SITRANS SL
■ Benefits
The in-situ SITRANS SL gas analyzer features high operational
availability, unique analytical selectivity, and a wide range of
possible applications. SITRANS SL permits measurement of a
gas component directly in the process:
• With high dust load
• In hot, humid, corrosive, explosive, or toxic gases
• In applications showing strong varying gas compositions
• Under harsh environmental conditions at the measuring point
• Highly selective, i.e. mostly without cross-sensitivities
Special features of the SITRANS SL:
• Little installation effort
• Minimum maintenance requirements
• Extremely rugged design
• High long-term stability through built-in, maintenance-free
reference gas cell
• Real-time measurements
Moreover, the analyzer provides warning and error messages:
• When maintenance is required
- With large variations in the reference signal
- With poor signal quality
• If the transmission violates an upper or lower limit
Siemens AP 01 · 2015
2/31
2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
■ Design
2
The SITRANS SL gas analyzer consists of a pair of cross-duct
sensors, a transmitter unit and a detector unit, both with the
same dimensions. The complete analyzer is integrated in these
two enclosures. The transmitter unit contains the laser source
whose light is transmitted to the receiver through the measurement path. The detector unit contains a photodetector including
electronics as well as a reference cell. The detector unit is connected to the transmitter unit by means of a sensor cable. A further cable on the receiver is used to connect the power supply
and the communication interfaces. The receiver enclosure contains a local user interface (LUI) with an LC display which can be
read through a window in the cover. The LUI is operated by remote-control.
Transmitter and detector units
Special features of the transmitter and detector units:
• In-situ cross-duct sensors, designed as transmitter and detector units, connected via sensor cable
• Powder-coated aluminium; stainless steel
• Degree of protection IP65
• Adjustable process connection plates
• Flange sizes (provided by customer): DN 50/PN 25,
ANSI 4’’/150 lbs
• Purging gas connections (see "Purging")
• Optional: Explosion-protected version in accordance with
- Ex II 2G Ex de op is IIC T6
Ex II 2D Ex tD A21 IP65 T85°C
Local user interface (LUI) of SITRANS SL in the detector unit
(display of measured value)
Remote control keypad for SITRANS SL
Connection cables
SITRANS SL is supplied as standard without connecting cables.
These must be provided by the customer or are available as accessories. Exception: The standard ATEX version is supplied
with pre-installed cabling.
SITRANS SL, detector unit
Parts in contact with the process gas
Only the stainless steel flange of the sensor with borosilicate window and FFKM gasket is wetted by the process gas. This has
optional connections for purging the process gas side with an
appropriate gaseous medium.
Display and control panel
Special features of the detector unit:
• Display for simultaneous output of result and device status
• LED backlighting of display
• Remote control with infrared interface for simplified configuration and operation for safe implementation in hazardous areas
• Menu-driven operation for parameterization and diagnostics
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Siemens AP 01 · 2015
The sensor cable connects together the transmitter and detector
units of the analyzer.
The sensor connecting cable available as a cable set for the
ATEX version as standard, and for non-Ex applications optionally, is offered in lengths of 5, 10 or 25 m. This (optional) cable
set also enables permanent installation of an Ethernet cable
used for service and maintenance purposes.
A rugged cable sleeve should be used as UV protection for installations in open cable ducts or channel systems.
The statutory directives must be observed in the event of installation in hazardous areas.
For the ATEX version of SITRANS SL, the sensor connecting cable must be connected between the two Ex-e terminal boxes secured on the transmitter and receiver units.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Inputs/outputs
• 2 analog inputs (4 to 20 mA) for process gas temperature and
pressure
• 2 analog outputs (4 to 20 mA) for gas concentration or for concentration and transmission
• 1 configurable binary input
• 2 configurable binary outputs (display of faults, maintenance
requirement, function monitoring, alarms for limit violations of
measured value or transmission)
• 1 Ethernet 10Base-TX port, only for servicing and maintenance
The PROFIBUS DP protocol provides DPV0, cyclic data. Measured values are provided with additional quality data.
Optional
• 1 Modbus interface with
- Output of concentration as cyclic data
- Alarm output, alarm classification
- Input for temperature and/or pressure data for compensation
• 1 PROFIBUS DP interface with:
- Output of concentration as cyclic data
- Alarm output, alarm classification
- Input for temperature and/or pressure data for compensation
Note:
In contrast to the other interfaces, the Ethernet plug-in connector
on standard non-Ex devices is only accessible following removal
of the detector unit cover. With the help of the sensor connection
cable set (optional with non-Ex devices), an Ethernet cable can
be permanently installed via the terminal box of the sensor connecting cable. The Ethernet connection via the sensor connecting cable can also only be used for temporary service and maintenance purposes.
NOTICE:
In an Ex environment, Ethernet connections may only be made
or removed with the permission of the plant operator!
■ Function
Operating principle
SITRANS SL is a gas analyzer employing single-line molecular
absorption spectroscopy. A diode laser emits a beam of infrared
light which passes through the process gas and is received by
a detector unit. The wavelength of the laser diode output is tuned
to a gas-specific absorption line. The laser continuously scans
this single absorption line with a very high spectral resolution.
The degree of absorption and the line shape are used for the
evaluation.
Transmitter
Receiver
Optics tube (transmitter)
Optics tube (receiver)
Laser
Optics
Laser electronics
Optics
Measured
volume
Electric interface
Reference
cell
Detector
Optics
Reference cell
Electric filter
Optics
Electric interface
Sensor head (transmitter)
Sensor head (receiver)
Computer for control and evaluation
Laser control
Electric
interface
Customer
interface
Local
display
Measurement External sensors
Alarms
for compensation
Basic design of the SITRANS SL
Siemens AP 01 · 2015
2/33
2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
The field design of the SITRANS SL in-situ gas analyzer consists
of a transmitter unit and a detector unit. The light which is not absorbed by the sample is detected in the receiver. The concentration of the gas component is determined from the absorption.
The SITRANS SL analyzer measures a single gas component by
means of the absorption capacity of a single fully resolved molecular absorption line.
2
Reference signal
Absorption
Measured signal
Wavelength [nm]
Configuration
A feature of the in-situ analytical procedure is that the physical
measurement takes place directly in the stream of process gas
and directly in the actual process gas line. All process parameters such as gas matrix, pressure, temperature, moisture, dust
load, flow velocity and mounting orientation can influence the
measuring properties of the SITRANS SL and must therefore be
investigated for each new application.
The standard applications listed in the ordering data for the
SITRANS SL are distinguished in that the typical process conditions are adequately well-known and documented. If you cannot
find your application among the standard applications, please
contact Siemens. We will be pleased to check your possible individual application of the SITRANS SL. You can find an application questionnaire on the SITRANS SL product site on the Internet: www.siemens.com/insituquestionnaire
Process flange
- Dimensions
- Temperature
Gas concentration
Flue gas
composition
Dust load
Gas velocity
Gas temperature
Gas pressure
Purging tube length
Receiver
Transmitter
Absorption spectrum of measured signal and reference signal with
SITRANS SL
SITRANS SL is designed for measuring oxygen (O2) and carbon
monoxide (CO) at high sensitivity.
Measuring
path length
Typical application specifications:
Process pressure/temperature conditions (with O2 application)
700 ... 5 000 hPa
(absolute)/0 ... 200 °C
900 ... 1 100 hPa
(absolute)/0 ... 600 °C
Carbon monoxide concentration
Smallest measuring range:
0 … 100 ppm @ 1 m
Largest measuring range:
0 … 6 000 ppm @ 30 cm
Process gas pressure/temperature
conditions with CO application
700 … 2 000 hPa (absolute) /
-20 … 300 °C
800 … 1 200 hPa (absolute) /
300 … 700 °C
The measuring performance of the SITRANS SL depends,
among others, on the actual, individual process conditions with
regard to concentration ranges, pressure and temperature.
An internal reference cell is used to constantly check the stability
of the spectrometer.
The self-calibration of the analyzer is therefore valid for one year
without the necessity for external recalibration using calibration
gases.
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Siemens AP 01 · 2015
Sensor cable
Purging on the sensor side
0 ... 100 vol %
Purging on the process side
Oxygen concentration
Typical cross-duct arrangement of the SITRANS SL
The SITRANS SL can be optionally purged on the process side
using appropriate purging gases to prevent contamination of the
sensor optics on the process side. Purging tubes on the sensor
heads, which slightly extend into the process gas stream, define
the effective measuring path length.
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Influences on the measurement
Pressure
Dust load
In addition to the temperature signal, an external pressure signal
can be fed to the instrument to provide complete mathematical
compensation for the pressure influence including the density
effect. Without compensation, the relative error caused by
changes in the process gas pressure is approx. 0.1 %/hPa. An
external pressure signal is therefore recommended in most
cases.
As long as the laser beam is able to generate a suitable detector
signal, the dust load in the process gas does not influence the
analytical result. By applying a dynamic background correction,
measurements can be carried out without any negative impact.
Under optimal conditions, the SITRANS SL can cope with dust
loads up to 20 g/Nm³ and up to a measured path length of 8 m.
The influence of a high dust load is extremely complex, and depends on the optical path length and particle size. The optical
damping increases exponentially at longer path lengths. Smaller
particles also have a very large influence on the optical damping. With high dust load, long path length and small particle size,
the technical support at Siemens should be consulted.
Temperature
The influence of temperature on the absorption line is compensated by a correction file. A temperature signal can be fed into
the instrument from an external temperature sensor. The signal
is then used for mathematical correction of the influence of the
temperature on the concentration strength. If the process gas
temperature remains constant, a static correction can be carried
out as an alternative. Without temperature compensation, the relative error caused by changes in the gas temperature has an extensive effect on the measurement (e.g. up to 0.24 %/K with the
O2 application). An external temperature signal is therefore recommended in most cases.
Transmitter unit
Flange connection plate
(process interface)
Effective optical path length
As a result of Beer-Lambert’s law, the absorption of laser light depends on the optical path length within the sample gas. Therefore the precision of the effective optical path length measurement can have an effect on the precision of the total
measurement.
Since the sensor optics on the process side usually has to be
purged to keep it clean for a longer period, the extent of the
mixed zone between the purging medium and the process gas
as well as the latter’s concentration distribution must be considered. In a typical in-situ installation with an optical path length of
several meters, the influence of the purging gas on the effective
path length can be ignored.
The maximum possible path length and dust load mutually affect
each other: the higher the dust load in the process, the shorter
the max. possible path length.
Receiver unit
Connecting
cable (optional)
Customer flange
Cable gland
Purging tube
(optional)
Sensor connecting cable
(optional)
Reference cell integrated
into receiver unit
Cable gland
Sensor connecting
cable (optional)
Design of the non-Ex version of the SITRANS SL system
Siemens AP 01 · 2015
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2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Connection cable
Analog-I/O, Modbus
Transmitter unit
Connection cable
PROFIBUS DP
Receiver unit
Connection
cable
2
ATEX cable
gland
Remote control
ATEX cable
gland
Cable gland
~1 m
~1 m
Lmax= 25 m
Ex-e junction box
Ex-e junction box
Design of the ATEX version of the SITRANS SL system
Conduit connection 1/2” NPT
(not shown)
Conduit connection 1/2” NPT
(not shown)
Transmitter unit
Ui: 30.2 V DC
Pi: 10 VA
Receiver unit
Remote control
FM label
Conduit connection 1/2” NPT
(not shown)
Design of the FM version of the SITRANS SL system
The transmitter and detector units are mounted on process
flanges provided by the customer. Correct alignment of these
flanges must be guaranteed, e.g. by using the optional sensor
alignment kit.
2/36
Siemens AP 01 · 2015
FM label
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Adjustment of the pair of sensors
The flange connection plates (process interface) of the
SITRANS SL to the process flanges on the customer side must
be correctly aligned so that the laser beam generated by the
transmitter hits the photodetector in the detector unit This is
guaranteed in that the transmitter and detector units have a
curved surface integrated in the connection plates. The adjustment is carried out by shifting the flanges on these surfaces,
through which the symmetry axis is aligned. The axis can be offset by ± 1 degree, which means that the process flanges must
be welded onto the process wall with at least this accuracy - see
following figure.
Min. 150 mm
2
Approx. 25 to 40 mm
PROCESS
Maximum deviation
± 1°
Process flange
Wall thickness
(incl. insulation)
Is measured following installation
Installation/adjustment requirements for the pair of cross-duct sensors
Siemens AP 01 · 2015
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Purging
2
The easiest way to avoid condensation and dust deposits on the
sensor windows or excessively high thermal load of the windows
and the sealing material as well as the sensor electronics is to
purge them (with O2 application: nitrogen). Purging must be selected depending on the application. The transmitted-light sensors can therefore be configured for the respective situation. The
application reference table provides recommendations for suitable purging for the standard applications.
If oxygen is to be measured with the SITRANS SL - which is also
present in measurable quantities in the ambient air - oxygen-free
purging gases must be used, such as nitrogen. It is equally necessary to purge the inside of the sensor heads, since the ambient air must also be displaced here out of the laser beam path.
A differentiation is therefore made between purging on the process side and purging on the sensor side.
Input for purging on the process side
Optics tube (transmitter or receiver)
Output for
purging on the sensor side
Process flange
Purging tube
Flange connection plate
(process interface)
Input for purging on the sensor side
Arrangement for purging on the sensor side of the SITRANS SL
Purging on process side
For purging on the process side, the flow of purging gas can be
adjusted between 0 and approx. 50 l/min at each sensor head
using a needle valve (included in delivery).
Purging on sensor side
This can be combined with the purging on the process side, if
required. Purging with nitrogen on the sensor side is almost always necessary for O2 applications to avoid an offset caused by
the oxygen of the air present in the unit. The cells in the sensor
head are then continuously purged with nitrogen. Particularly
when (re)starting the SITRANS SL O2, a sufficiently high flow of
purging gas of approx. 3 to 5 l/min must be provided for several
minutes to ensure that all residues of oxygen are removed. The
flow of sensor purging gas can subsequently be set to a lower
value using the needle valve (included in delivery).
Note:
With purging on the process side, it may be necessary to use
non-return valves to ensure no process gas can enter the purging gas line in the event of failure of the purging gas supply. This
applies especially in the case of cascaded process and sensor
purging where there is otherwise the danger that, for example,
corrosive process gases could enter the sensor enclosure.
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Siemens AP 01 · 2015
Sensor head (transmitter or receiver)
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Purging tubes
The purging media used on the process side flow through purging tubes into the process gas stream. The tubes extend into the
process area by a few centimeters, usually perpendicular to the
process gas stream. This means that an exactly defined optical
path length is defined through the sample gas. The effective
measuring path in the process gas is therefore defined as the
distance between the ends of the two purging tubes. The standard length of the purging tubes is 340 mm. To enable sufficient
alignment, the process wall should be max. 150 mm thick.
2
Optical path length
Process wall
Purging tube
Measurement of the optical path length between the ends of the purging gas tubes
Maintenance and fault messages
Note
The SITRANS SL carries out continuous self-monitoring, and
outputs alarms and warnings to indicate maintenance requirements or a system fault. The information is output as plain text on
the LUI display, where symbols identify the category and the severity of the fault.
Specific requirements for the measuring point can make the utilization of special sensor equipment necessary. The possibilities
for adapting the sensors are:
• Special materials for purging tubes (on request)
• Various types/sizes of sensor flanges
• Explosion-protected sensor configurations
Alarm categories:
• Maintenance (system must be cleaned or repaired)
• Process value (problem with external sensor, or process conditions outside the permissible range for SITRANS SL)
• Configuration (SITRANS SL is not correctly configured)
Severity:
• Fault (measurements could not be carried out)
• Warning (measurements may be inaccurate, or the system will
soon shut down measuring mode if an intervention is not
made)
• Advanced warning/information
(measurements are carried out)
The two binary (relay) outputs can be configured freely for the
alarm output.
The response of the analog outputs in the event of an alarm is
configurable; possible actions are:
• Off (current measured value is displayed)
• Last measured value (freezing of last value displayed)
• Standard level (setting to predefined value)
• 3 mA (NAMUR NE43 fault status)
Essential characteristics
• Long-term stabilization through use of an internal reference
cell; calibration interval at least one year
• Dynamic background correction for varying dust loads
• Isolated signal outputs of 4 to 20 mA
• User-friendly, menu-driven operation
• Selectable time constants (response time)
• Password-protected user interface
• I/O operation in accordance with NAMUR recommendations
• Monitoring of overall optical transmission
• Sensor enclosure resistant to wear and corrosion
• Simple local operation using remote-control unit with numeric
keypad and menu prompting
In addition, the transmission is available as an output variable.
Siemens AP 01 · 2015
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Standard applications
The following table lists the measuring conditions for standard
applications. The listed values for the measuring range and detection limit are only approximate values. The exact values at the
respective measuring point depend on the totality of all influencing variables and can be determined by Siemens for the specific
case. Please note that the values for the detection limit and the
2
Standard application
Effective optical path
length: 0.3 … 8 m
Dust load2): < 50 g/Nm3
maximum measuring range refer to a path length of 1 m. Longer
path lengths will improve the detection limit, but not linearly. due
to limiting effects such as dust load. The maximum applicable
measuring ranges can only be used if permitted by the process
conditions such as dust load.
Process gas Process gas
temperature pressure
Tmin … Tmax pmin … pmax
Min.
measuring
range
(with 1 m
eff. opt. path
length)
Max.
measuring
range
(also dependent
on eff. opt. path
length: see following column)
Max.
measuring
range x path
length
DL x path
Repeata- Purging
length
bility3)
gas
(under
medium
standard
conditions1)
without
cross-interference of
other gases)
Sample
gas component
Gas Appl.
code code
O2
A
B
0 … 600 °C
900 ... 1 100 hPa
0 … 1 vol%
0 … 100 vol%
75 vol%*m
200 ppmv*m
2%
N2
O2
A
C
0 … 200 °C
700 … 5 000 hPa 0 … 1 vol%
0 … 100 vol%
75 vol%*m
200 ppmv*m
2%
N2
CO
J
C
-20 … 700 °C 700 ... 2 000 hPa, 0 … 100 ppmv 0 … 6 000 ppmv 2 000 ppmv*m 0.6 ppmv*m4) 2 %
max. 300 °C
800 ... 1 200 hPa,
above 300 °C
Air, N2
Reference table: Standard applications. The specified pressures are absolute.
DL = detection limit
1)
At 20 °C, 1 013 hPa, without dust
2)
With 0.3 m effective optical path length
Average diameter of the dust particles: 15 µm
Specific weight of the dust particles: 650 kg/m3
The influence of dust load is extremely complex, and depends on the path length and particle size. The optical attenuation increases exponentially at longer
path lengths. Smaller particles also have a very large influence on the optical attenuation. With high dust load, long path length and small particle size, the
technical support at Siemens should be consulted.
3)
Referred to measuring range.
With stable or externally measured and software-compensated process gas temperature and pressure conditions.
4)
The measurement of CO can be significantly affected by hydrocarbons, such as CH4. Ensure there is no CH4 in the process or contact Siemens and describe
the process conditions using the provided application questionnaire (see below).
Special applications
In addition to the standard applications, special applications are available upon request. If the process
conditions deviate from the specifications of the standard applications, special applications are also
possible on request. Please complete the application questionnaire which can be found at
www.siemens.com/insituquestionnaire on the Internet.
2/40
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
■ Technical specifications
Analytical performance
Design, enclosure
Measuring range
Internally adjustable
Degree of protection
IP65 according to EN 60529
Detection limit at standardized
conditions:
25 °C gas temperature, 1 000 hPa,
1 m effective optical path length, 3 s
integration time and constant ambient conditions.
O2: 200 ppmv
CO: 0.6 ppmv
Dimensions
For each unit
(transmitter, detector)
• Diameter: 165 mm
• Length: 357 mm
Purging tube
Linearity
(under standard conditions)
Better than 1 %
Length, outer diameter, inner
diameter:
340, 48, 44 mm
Repeatability
(under standard conditions)
O2: 1 % of the measuring range
CO: 0.5 % of the measuring range
Weights
General information
Design
Transmitter and detector units,
connected by a sensor cable
Materials
• Sensor enclosure: treated
aluminium/stainless steel
(1.4305/303)
• Process interface: acid-resistant
stainless steel (1.4404/316L)
• Window: hardened borosilicate
glass
• Compressible gaskets: FKM,
FFKM, EPDM (holder for reference cell)
• Flat gaskets: Graphite
Parts wetted by the process gases
• Purging tubes, flanges, window
ring, process purging: acid-resistant stainless steel
• Window: Borosilicate
• Gasket in window: FFKM
• Flat gasket between customer
flange and process flange: Graphite
Installation
In-situ or bypass
Concentration units
ppm, vol. %, mg/Nm3
Display
Digital concentration display
(4 digits with floating decimal
point)
Laser protection class
Class 1, safe to the eye
Explosion protection
Optionally, according to
• ATEX II 2G Ex de op is IIC T6
ATEX II 2D Ex tD A21 IP65
T85 °C
• FM Class I, II, III Div 1 Groups A,
B, C, D, E, F, G T6
FM Class I, Zn 1, AEx d IIC T6
FM Class II, Zn 21, AEx td
T85 °C
• XP Class I, II, III Div 1 Groups C,
D T6 Ta = 55 °C;
DIP Class II,III Div 1 Groups E, F,
G T6 Ta = 55 °C; Class I, Zn 1,
Ex d IIC T6 Ta =55 °C; Zn 21, Ex
tD T85 °C Ta = 55 °C
• Detector unit
6.0 kg
• Transmitter unit
5.2 kg
• Process interface
- for DN 50/PN 25
5.3 kg
- for ANSI4’’/150 lbs
Approx. 12 kg
Connection dimension customer
flange
DN 50/PN 25, DN 50/PN 40 or
ANSI 4"/150 lbs
Electrical characteristics
Power supply
24 V DC nominal (18 ... 30.2 V DC)
Power consumption, maximum
10 VA
EMC
In accordance with EN 61326-1
Electrical safety
In accordance with EN 61010-1
Fuse specifications
T1.6L250V
Dynamic performance
Warm-up time at 20 °C ambient
temperature
Approx. 15 min
Response time (T90)
Approx. 2 s,
depends on application
Integration time
0 ... 100 s, selectable
Influencing variables
Variations in ambient temperature
< 0.5 %/10 K of the measuring
range
Process gas temperature
With compensation: < 1 %/100 K
of the measuring range
Variations in atmospheric pressure
Negligible
Process gas pressure
O2: With compensation:
< 1 %/4 000 hPa of the
measuring range
CO: Negligible
Variations in supply voltage
Negligible
Siemens AP 01 · 2015
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2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Electrical inputs and outputs
2
Measuring conditions
Number of measurement channels
1
Analog outputs
2 outputs, 4 ... 20 mA, floating,
ohmic resistance max. 660 Ω.
External isolating power supplies
may have to be provided by the
customer.
Analog inputs
2 inputs, designed for 4 ... 20 mA,
120 Ω
Digital outputs
2 outputs, with switchover contacts, configurable, 24 V/0.5 A,
floating, single pole double throw
(SPDT)
Measurement path
0.3 ... 8 m (other lengths: please
contact Siemens)
Process gas pressure, temperature
• O2: 900 ... 1 100 hPa,
0 … 600 °C
• O2: 700 … 5 000 hPa,
0 … 200 °C
• CO: 700 … 2 000 hPa,
-20 … 300 °C
• CO: 800 … 1 200 hPa,
300 … 700 °C
Dust load
The influence of a high dust load
is complex, and depends on the
optical path length and particle
size distribution.
Digital input
1 input, designed for 24 V,
floating, configurable
Service port
Ethernet 10BaseT (RJ-45)
Purging
RS 485 PROFIBUS DPV0 version
Two-wire interface, up to 3 Mbit/s,
-7 … 12 V
Purging gas
RS 485 Modbus version
Two-wire interface, up to
115 200 bit/s, -7 … 12 V
• Nitrogen
(for O2 and CO applications)
• Instrument air
(for CO applications)
• Quality
O2 application: Purity better than
99.7 % in order to achieve full
performance. For oxygen measurements, an O2 content
< 0.01 vol. % in the purging gas
is recommended.
< -10 °C, condensation on the
optics must be avoided
Cable to customer interface (not included in standard delivery,
permanently installed for ATEX, optionally available for Standard)
Analog connection cable
(with ATEX configuration: only
supplied cables may be used!)
10 x 2, with shielding in twistedpair configuration (depending on
type and number of I/Os used)
PROFIBUS DP connection cable
(with ATEX configuration: only
supplied cables may be used!)
1 x 2 + 4 (PROFIBUS DP hybrid
cable)
• Dew point
Modbus connection cable
(with ATEX configuration: only
supplied cables may be used!)
1 x 2 + 3, with shielding in
twisted-pair configuration
• Max. overpressure in the sensor
500 hPa
0 ... +55 °C
Cable length for ATEX configuration
3m
• Purging gas temperature
on sensor side
Conductor cross-section
Min. 0.34 mm²
• Flow
Cable diameter
8 ... 12 mm or 13 ... 18 mm
Minimum bending radius
ATEX-PROFIBUS
110 mm
O2 application: When commissioning a sensor enclosure previously filled with air: 3 ... 5 l/min
(for at least 15 min), subsequently: at least 0.25 l/min
Sensor purging
Sensor cable (not included in standard delivery, permanently
installed for ATEX, optionally available for Standard)
Purging on the process side
(optional)
Sensor cable type configuration
• Pressure at purging gas inlet
2 000 ... 8 000 hPa
• Flow
Dependent on process gas
pressure, process gas velocity,
dust load, moisture, etc. up to
max. 50 l/min
4 x 2, with shielding,
in twisted-pair configuration
Conductor cross-section
Min. 0.34 mm²
Cable sheath
PUR (polyurethane)
Dimensions
• Diameter: 11 mm
• Length: up to 25 m
Minimum bending radius
ATEX: 85 mm
Climatic conditions
Ambient temperature range
• -20 ... +55 °C during operation
(additional solar radiation not
permissible!)
• -40 ... +70 °C during transport
and storage
Temperature range on the sensor
side of the process interface (connection plate)
-20 ... +70 °C
Atmospheric pressure
800 ... 1100 hPa
(for ATEX and FM version)
Humidity
< 100 % rel. humidity
2/42
Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
■ Accessories
SITRANS SL sensor alignment kit
Calibration test kit
The SITRANS SL sensor alignment kit includes a battery-operated lamp, a centering aid with crosshair, and two hook spanners for loosening the sensors from the flange connection plates.
The SITRANS SL has already been factory-calibrated. If it is desirable or necessary to check the calibration, this can be performed using an external calibration test kit following removal of
the transmitter and detector units. This procedure has no influence on the optical adjustment of the unit since the flange connection plates remain mounted on the customer flange. The calibration test kit for O2 consists of a stainless steel calibration
tube and a thermometer. To carry out the calibration, it is
mounted between the transmitter and receiver. The calibration
tube for O2 can then be filled with air or a calibration gas.
Please note:
The SITRANS SL sensor alignment kit is not explosion-protected! Therefore it must never be used in a hazardous area
without approval by the plant operator!
Thermometer
Transmitter
Calibration tube for O2
Receiver
Needle valves
ATEX adapter cable
Calibration validation setup of SITRANS SL O2
Siemens AP 01 · 2015
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2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
■ Dimensional drawings
Note
the SITRANS SL sensors must be accessible from the side.
A space of at least 60 cm must be provided next to the
SITRANS SL transmitter and detector units in order to facilitate
maintenance and servicing.
To fulfill the safety requirements, a clearance of at least 10 cm
must be provided around the SITRANS SL to maintain cooling.
Process purging input
/RRSFDEOHMXQFWLRQER[
$7(;YHUVLRQRUDVDQRSWLRQ
112
Process interface
Purging tube
163
Process flange
2°
Sensor purging input
340
357
SITRANS SL, transmitter/detector unit (same housing for DN 50/PN 25 process interface version), dimensions in mm
2/44
Siemens AP 01 · 2015
Ø 9"
Ø 7½"
Ø 125 mm
Connection dimensions of process flanges provided by customer DN 50/PN 25 and ANSI 4’’/150 lbs
Ø 4"
Ø 3/4"
(for 5/8” screwed gland)
Ø 18 mm
(for M16
screwed gland)
Ø 50 mm
2
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
■ Schematics
Electrical connections
Non-EEx version: connection cable - customer interface
Terminal block in the receiver enclosure
Function/voltage
1
+
2
-
Power supply
19 … 30.2 V, 10 VA1)
3
Normally closed under power4)
Binary output 0 (relay)
30 V, 0.5 A3)
Normally closed under power4)
Binary output 1 (relay)
30 V, 0.5 A3)
7
+
8
-
Binary input 0
0 … 30 V2)
9
+
10
-
11
+
12
-
13
PROFIBUS A line
(RxD/TxD_N - data inverted)
14
PROFIBUS B line
Modbus D0
(RxD/TxD_P - data not inverted) (RxD/TxD_P - data not inverted)
15
PROFIBUS/Modbus shield
16
T x+
17
T x-
Orange
18
Rx+
White/green
19
Rx-
Green
20
+
21
-
22
+
23
-
4
5
6
Ethernet cable
2
Analog output 0 (measurement)
30 V, 24 mA3)
Analog output 1 (measurement)
30 V, 24 mA3)
Modbus D1
(RxD/TxD_N - data inverted)
RS 485
(PROFIBUS/Modbus)
-7 ... +12 V DC
Ethernet5)
White/orange
Analog input 0 (temperature)
0 … 30 mA2), 120 Ω
Analog input 1 (pressure)
0 … 30 mA2), 120 Ω
24
Grounding
25
Grounding
Ground
Grounding
Ground
Grounding
Shielding
1)
This is the maximum power consumption of the SITRANS SL
2)
These are the maximum input values
3)
These are the maximum output values
4)
Note:
"Normal operation" stands for normal operation of the analyzer. The system is connected to the voltage source and is running without problems;
no error message generated or displayed.
"Normal under power" refers to the status of the relay under the above-named normal operation. The relay contact of the alarm signal is closed.
5)
We recommend that the Ethernet connection is not made via the cable to the Ethernet terminals in the detector unit. Instead, the Ethernet connection should
be made via the sensor cable connection set which is optionally available for the detector unit.
Siemens AP 01 · 2015
2/45
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Examples of digital output and analog output
Terminal strip in
terminal box
Function
Color code
1
+
-
24 V DC voltage supply
for transmitter unit
Red
2
3
Com +
Communication with transmitter
Pink
4
Com -
Gray
5
Sync + Synchronization with transmitter
White
6
Sync -
Brown
7
NC
Not used
-
8
Tx+
Ethernet
Gray/pink
9
Tx-
Red/blue
V0 can be up to 30 V
10
Rx+
Black
Rload must be at least 60 Ω
(max. 0.5 mA in relay)
11
Rx-
PE
terminal
-
> SITRANS SL
Customer side <
Imeas
3
V0
2
Rload
4
Example of digital output 0
Customer side <
Imeas
V0
Rload
> SITRANS SL
9
10
V0 must be min 7.5 and max 30 V
Rload can be maximum
V0 - 7.5
Ω
0.025
Example of analog output 0
Caution:
Please note that an external isolating power supply may be
required!
2/46
Sensor cable terminal box on the receiver side (ATEX version)
Siemens AP 01 · 2015
Blue
Violet
Grounding
Green
PE
terminal
Grounding
Yellow
Gland
Grounding
Shielding
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
Selection and ordering data
Article No.
SITRANS SL in-situ gas analyzer
7MB6221- 7 7 7 7 7 - 7 7 7 7
Cannot be combined
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Explosion protection
Without
Ex II 2 G Ex de op is IIC T6
Ex II 2 D Ex tD A21 IP65 T85°C
FM USA:
XP Class I, II, III Div 1 Groups A, B, C, D T6 Ta = 55°C
DIP Class II,III DIV 1 Group EFG Ta = 55°C
Class I, Zn 1, AEx d IIC T6 Ta = 55°C
Zn 21, AEx tD T85°C Ta = 55°C
FM Canada:
XP Class I, II, III Div 1 Groups C, D T6 Ta = 55°C
DIP Class II,III DIV 1 Group EFG
Class I, Zn 1, Ex d IIC T6 Ta =55°C
Class II, III Zn 21, Ex t IIIC T85°C Ta = 55°C
Measured component
O2
CO
0
1
0
1
2
2
2
2
A
J
Application examples1)
Control of combustion processes
Process control, safety monitoring in appropriate plant concepts
Communication interface
Analog
PROFIBUS DP
Modbus
A
J
B
C
B
B
0
1
2
Purging tubes, material
No purging tubes
Stainless steel
Length
Purging mode, process side
Sensor side
No purging
No purging
No purging
3 ... 5 l/min
0
1
0 ... 50 l/min
0 ... 50 l/min
No purging
3 ... 5 l/min
2
3
340 mm
0
1
0
1
2
Process interface 2)
Connection dimension ANSI 4" 150 lbs (EN 1.4404/316L), MAWP (PS) @ 20 °C: 232 psi
B
Connection dimension DN 50/PN 25 (EN 1.4404/316L), MAWP (PS) @ 20°C: 2.5 MPa
C
Connection dimension DN 50/PN 40 (EN 1.4404/316L), MAWP (PS) @ 20°C: 4.0 MPa
E
E
Sensor cable
5m
10 m
25 m
with brass cable gland
with brass cable gland
with brass cable gland
A
B
C
A
B
C
A
B
C
5m
10 m
25 m
with stainless steel cable gland
with stainless steel cable gland
with stainless steel cable gland
D
E
F
D
E
F
D
E
F
Without cable
Documentation language
German
English
French
Spanish
Italian
X
X
0
1
2
3
4
1)
The examples shown represent possible applications where appropriately configured SITRANS SL solutions can be used. The user is responsible for the prevailing
conditions (plant concept (possibly redundant), application of appropriate components required in addition, compliance with possible directives, etc.).
2)
MAWP: Maximum Allowable Working Pressure
Siemens AP 01 · 2015
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© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
In-situ O2 and CO gas analyzer
2
Selection and ordering data
Additional versions
Add "-Z" to Article No. and specify Order code
Acceptance test certificate 3.1 (leak test) in accordance with EN 10204
Acceptance test certificate 3.1 (material certificate) in accordance with EN 10204
SIL 1 conformity declaration in accordance with standards IEC 61508/IEC 61511
(for the measured component oxygen in combination with analog interfaces)
TAG label, customized inscription
1)
Order code
C12 1)
C13 1)
C20 1)
Y30
Together with explosion protection as per FM, on request
Selection and ordering data
Additional units
Calibration verification kit O2, SITRANS SL
Calibration verification kit CO, SITRANS SL
SITRANS SL sensor alignment kit
Ex-e junction box for 25-wire cable
Cable set analog (for non-Ex SITRANS SL)
Cable set PROFIBUS DP (for non-Ex SITRANS SL)
UV protective hose for outdoor use, ND = 48 mm, per 30 m
Sensor connecting cable set
• 25 m
• 10 m
•5m
Spare parts
Process interface DN 50 PN 10 ... 40 incl. gasket
Gasket DN 50/PN 10 ... 40
Process interface ANSI 4" Class 150 incl. gasket
Gasket ANSI 4" Class 150
Purging tube 340 mm incl. gasket for DN 50/PN 10 ... 40
Window lid for receiver housing
Lid for transmitter housing
Cable, analog, brass, EX
Cable, analog, VA, EX
Cable, PROFIBUS, brass, EX
Cable, PROFIBUS, VA, EX
Cable, transmitter, VA, EX
Junction box, transmitter, VA, EX
Junction box, transmitter, brass, EX
Cabeling, transmitter, brass, EX
Interconnection cable 5 m
Interconnection cable 10 m
Interconnection cable 25 m
Cable, receiver, VA, EX
Junction box, receiver, VA, EX
Cabeling, receiver, brass, EX
Cable gland kit, non-EX
Clamp ring
Light source with adapter
LUI
Remote control IS, CSA, FM, ATEX
Needle valve kit
Capillary kit
2/48
Siemens AP 01 · 2015
Article No.
Item number (see figure
on the next page)
A5E01000694
A5E03090938002
A5E01000740
A5E01267567
A5E03328474
A5E03328473
A5E01714061
A5E02528052
A5E02528048
A5E02509347
3+4+5
3+4+5
3+4+5
A5E01009881
A5E02522036
A5E01009883
A5E02789535
A5E01009892
A5E01009897
A5E02568437
A5E02608597
A5E34834297
A5E02608594
A5E34834296
A5E34830928
A5E34831075
A5E02091532
A5E02568463
A5E02571180
A5E02571184
A5E02571186
A5E34831050
A5E34831078
A5E02568465
A5E02568457
A5E01010033
A5E33259745
A5E31503119
A5E02091214
A5E02569944
A5E02183375
6
6
6
6
2
1
1
1+2
5
5
5
4
3
3+4
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
SITRANS SL
Documentation
■ Selection and ordering data
Manual
Article No.
SITRANS SL manual
• German
A5E01132949
• English
A5E01132948
• French
A5E01132951
• Italian
A5E01132952
• Spanish
A5E01132953
2
]
X
Z
Y
\
[
SITRANS SL spare parts, item numbers
Siemens AP 01 · 2015
2/49
© Siemens AG 2015
Continuous Gas Analyzers, in-situ
Notes
2
2/50
Siemens AP 01 · 2015
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